package com.spdg.ring.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;
import cn.wolf.tools.CommonUtils;

import com.spdg.ring.R;
import com.spdg.ring.common.Config;
import com.umeng.analytics.MobclickAgent;

/**
 * 全局异常捕获类
 * @author Eric.wsd
 * @since 2012-5-21
 */
public class GlobalExceptionHanlder implements UncaughtExceptionHandler{
	
	public static final String TAG = "GlobalExceptionHanlder";  
	
	public static final String ACTION = "cn.ffcs.wisdom.utils.GlobalExceptionHanlder";
    
    //系统默认的UncaughtException处理类   
    private Thread.UncaughtExceptionHandler mDefaultHandler;  
    //GlobalExceptionHanlder实例  
    private static GlobalExceptionHanlder mHandler;  
    //程序的Context对象  
    private Context mContext;  
    //用来存储设备信息和异常信息  
    private Map<String, String> infos = new HashMap<String, String>();  
  
    //用于格式化日期,作为日志文件名的一部分  
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");  
	
    //日志位置
    private static final String logPath = Config.SDCARD_LOG_DIR;
    
    //异常信息等级
    
	public GlobalExceptionHanlder() {
	}
	
	
	
	/** 
     * 注册异常处理
     *  
     * @param context 
     */  
    public void register(Context context) {  
        mContext = context;  
        //获取系统默认的UncaughtException处理器  
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();  
        //设置该GlobalExceptionHanlder为程序的默认处理器  
        Thread.setDefaultUncaughtExceptionHandler(this);  
    }
	
	/** 获取GlobalExceptionHanlder实例 ,单例模式 */  
    public static GlobalExceptionHanlder getInstance() {  
    	if(mHandler == null) {
    		mHandler = new GlobalExceptionHanlder(); 
    	}
        return mHandler;  
    } 
	
	@Override
	public void uncaughtException(Thread thread, Throwable ex) {
		if(!CommonUtils.isNetConnectionAvailable(mContext)) {
			Toast.makeText(mContext, R.string.network_error, Toast.LENGTH_LONG).show();
		}
		
		if (!handleException(ex) && mDefaultHandler != null) {  
            //如果用户没有处理则让系统默认的异常处理器来处理  
            mDefaultHandler.uncaughtException(thread, ex);  
        } else {  
            try {  
                Thread.sleep(3000);  
            } catch (InterruptedException e) {  
                Log.e(TAG, "error : ", e);  
            }  
            
            systemExit();
        }
	}
	
	/**
	 * 退出程序
	 */
	private void systemExit() {
        Intent intent = new Intent();
        intent.setAction(GlobalExceptionHanlder.ACTION);
        android.os.Process.killProcess(android.os.Process.myPid());  
        System.exit(0); 
	}
	
	/**
	 * 检查SD卡是否可用
	 * @return
	 */
    public static boolean checkSDCard() {
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED))
            return true;
        else
            return false;
    } 
    
    
    /** 
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成. 
     *  
     * @param ex 
     * @return true:如果处理了该异常信息;否则返回false. 
     */  
    private boolean handleException(Throwable ex) {  
        if (ex == null) {  
            return true;  
        }  
        
        //使用Toast来显示异常信息  
        new Thread() {  
            @Override  
            public void run() {  
                Looper.prepare();  
//                Toast.makeText(mContext, R.string.global_exception_tips, Toast.LENGTH_LONG).show();  
                Looper.loop();  
            }  
        }.start();
        
        //收集设备参数信息   
        collectDeviceInfo(mContext);  
        //保存日志文件   
        saveCrashInfo2File(ex);
        
        //分类处理异常
        return true;
    }  
    
    /** 
     * 收集设备参数信息 
     * @param ctx 
     */  
    public void collectDeviceInfo(Context ctx) {  
        try {  
            PackageManager pm = ctx.getPackageManager();  
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);  
            if (pi != null) {  
                String versionName = pi.versionName == null ? "null" : pi.versionName;  
                String versionCode = pi.versionCode + "";  
                infos.put("versionName", versionName);  
                infos.put("versionCode", versionCode);  
            }  
        } catch (NameNotFoundException e) {  
            Log.e(TAG, "an error occured when collect package info", e);  
        }  
        Field[] fields = Build.class.getDeclaredFields();  
        for (Field field : fields) {  
            try {  
                field.setAccessible(true);  
                infos.put(field.getName(), field.get(null).toString());  
                Log.d(TAG, field.getName() + " : " + field.get(null));  
            } catch (Exception e) {  
                Log.e(TAG, "an error occured when collect crash info", e);  
            }  
        }  
    }  
  
    /** 
     * 保存错误信息到文件中 
     *  
     * @param ex 
     * @return  返回文件名称,便于将文件传送到服务器 
     */  
    private String saveCrashInfo2File(Throwable ex) {  
          
        StringBuffer sb = new StringBuffer();  
        for (Map.Entry<String, String> entry : infos.entrySet()) {  
            String key = entry.getKey();  
            String value = entry.getValue();  
            sb.append(key + "=" + value + "\n");  
        }  
          
        Writer writer = new StringWriter();  
        PrintWriter printWriter = new PrintWriter(writer);  
        ex.printStackTrace(printWriter);  
        Throwable cause = ex.getCause();  
        while (cause != null) {  
            cause.printStackTrace(printWriter);  
            cause = cause.getCause();  
        }  
        printWriter.close();  
        String result = writer.toString();  
        sb.append(result);  
        Log.d(TAG, result);
        FileOutputStream fos = null;
        try {  
            long timestamp = System.currentTimeMillis();  
            String time = formatter.format(new Date());  
            String fileName = "RingRing-" + time + "-" + timestamp + ".log";  
            if (checkSDCard()) {  
                File dir = new File(logPath);  
                if (!dir.exists()) {  
                    dir.mkdirs();  
                }  
                fos = new FileOutputStream(logPath + fileName);  
                
                fos.write(sb.toString().getBytes());  
                
                //UMeng 异常统计
                MobclickAgent.reportError(mContext, sb.toString());
                
            }  
            return fileName;  
        } catch (Exception e) {  
            Log.e(TAG, "an error occured while writing file...", e);  
        }  finally {
        	try {
        		if(fos != null) {
        			fos.close();
        		}
			} catch (IOException e) {
				Log.e(TAG, "an error occured while close file...", e); 
			}  
        }
        return null;  
    }  
    
    /**
     * 删除所有的日志文件
     */
    public void clearAllLogs(final Context ctx) {
		if(checkSDCard()) {
			File file = new File(logPath);
			if(file != null && file.exists()) {
				File[]files = file.listFiles();
				for(int i=0; i<files.length; i++) {
					files[i].delete();
				}
			}
		}
    }
    
    /**
     * 异步删除所有日志文件
     * @param ctx
     */
    public void asynClearAllLogs(final Context ctx) {
    	new Thread() {
    		public void run() {
    			clearAllLogs(ctx);
    		}
    	}.start();
    }
}  

